149152609 has 4 divisors (see below), whose sum is σ = 149234116. Its totient is φ = 149071104.

The previous prime is 149152607. The next prime is 149152637. The reversal of 149152609 is 906251941.

149152609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22657600 + 126495009 = 4760^2 + 11247^2 .

It is a cyclic number.

It is not a de Polignac number, because 149152609 - 2¹ = 149152607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (149152607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37944 + ... + 41689.

It is an arithmetic number, because the mean of its divisors is an integer number (37308529).

Almost surely, 2^149152609 is an apocalyptic number.

It is an amenable number.

149152609 is a deficient number, since it is larger than the sum of its proper divisors (81507).

149152609 is an equidigital number, since it uses as much as digits as its factorization.

149152609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81506.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 149152609 is about 12212.8051241310. The cubic root of 149152609 is about 530.3268530921.

The spelling of 149152609 in words is "one hundred forty-nine million, one hundred fifty-two thousand, six hundred nine".